Re: Getting nutt...

Bill Hawes (
Tue, 05 Aug 1997 16:13:00 -0400

Philippe Strauss wrote:
> Ahem, still for this oops-o-matic kernel that I have..
> I can only reproduce it with this exact set of patches:

The various oops that you've observed are all consistent with the
consequences of a page unlocking early: sometimes the scsi driver has
its buffers taken away, and sometimes shrink_mmap is walking a buffer
list when it disappears.

The influence of the stack-not-exec patch might be to change the value
of an uninitialized variable on the stack.

I just had an idea while typing this -- a while back I did a patch for
fs/exec.c that cleaned up stack trash that was being passed to the
read-ahead routines. That patch isn't in 2.0.xx, so I wonder if it's
possible that bogus read-ahead parameters are somehow affecting your
scsi driver? It could affect the pattern of read-ahead ... kind of a
long shot, but I don't have an other ideas.